I don't think they're terribly good at convincing people who don't already agree with them, actually. I've watched a lot of the show, and I think their science is sometimes pretty flawed. I'd rather give Phil or Jay or Bob B. or someone a show to do it. Oh, wait--they already did! Pity Jay didn't get to directly rebut the people in question, but he still did a pretty good job, I thought.

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Gillian

"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"

"You can't erase icing."

"I can't believe it doesn't work! I found it on the internet, man!"